refactor publish workflow to use security, cleanup configuration

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | yes
| Deprecations? | no
| Tests pass?   | TODO
| Fixed tickets | #45, #49, #58
| License       | MIT
| Doc PR        | TODO

This is a vast simplification and moving towards standard symfony concepts that people already know. If we do this, we get a lot more flexible.